<?php

/**
 * A PostgreSQL store.
 *
 * @package OpenID
 */

// Do not allow direct access
defined( '_JEXEC' ) or die( 'Restricted access' );

/**
 * Require the base class file.
 */
require_once "Auth/OpenID/SQLStore.php";

/**
 * An SQL store that uses PostgreSQL as its backend.
 *
 * @package OpenID
 */
class Auth_OpenID_PostgreSQLStore extends Auth_OpenID_SQLStore {
	/**
	 * @access private
	 */
	function setSQL()
	{
		$this->sql['nonce_table'] =
			"CREATE TABLE %s (server_url VARCHAR(2047) NOT NULL, ".
							 "timestamp INTEGER NOT NULL, ".
							 "salt CHAR(40) NOT NULL, ".
				"UNIQUE (server_url, timestamp, salt))";

		$this->sql['assoc_table'] =
			"CREATE TABLE %s (server_url VARCHAR(2047) NOT NULL, ". 
							 "handle VARCHAR(255) NOT NULL, ".
							 "secret BYTEA NOT NULL, ".
							 "issued INTEGER NOT NULL, ".
							 "lifetime INTEGER NOT NULL, ".
							 "assoc_type VARCHAR(64) NOT NULL, ".
			"PRIMARY KEY (server_url, handle), ".
			"CONSTRAINT secret_length_constraint CHECK ".
			"(LENGTH(secret) <= 128))";

		$this->sql['set_assoc'] =
			array(
				  'insert_assoc' => "INSERT INTO %s (server_url, handle, ".
				  "secret, issued, lifetime, assoc_type) VALUES ".
				  "(?, ?, '!', ?, ?, ?)",
				  'update_assoc' => "UPDATE %s SET secret = '!', issued = ?, ".
				  "lifetime = ?, assoc_type = ? WHERE server_url = ? AND ".
				  "handle = ?"
				  );

		$this->sql['get_assocs'] =
			"SELECT handle, secret, issued, lifetime, assoc_type FROM %s ".
			"WHERE server_url = ?";

		$this->sql['get_assoc'] =
			"SELECT handle, secret, issued, lifetime, assoc_type FROM %s ".
			"WHERE server_url = ? AND handle = ?";

		$this->sql['remove_assoc'] =
			"DELETE FROM %s WHERE server_url = ? AND handle = ?";

		$this->sql['add_nonce'] =
				  "INSERT INTO %s (server_url, timestamp, salt) VALUES ".
				  "(?, ?, ?)"
				  ;

		$this->sql['clean_nonce'] =
			"DELETE FROM %s WHERE timestamp < ?";

		$this->sql['clean_assoc'] =
			"DELETE FROM %s WHERE issued + lifetime < ?";
	}

	/**
	 * @access private
	 */
	function _set_assoc($server_url, $handle, $secret, $issued, $lifetime,
						$assoc_type)
	{
		$result = $this->_get_assoc($server_url, $handle);
		if ($result) {
			// Update the table since this associations already exists.
			$this->connection->query($this->sql['set_assoc']['update_assoc'],
									 array($secret, $issued, $lifetime,
										   $assoc_type, $server_url, $handle));
		} else {
			// Insert a new record because this association wasn't
			// found.
			$this->connection->query($this->sql['set_assoc']['insert_assoc'],
									 array($server_url, $handle, $secret,
										   $issued, $lifetime, $assoc_type));
		}
	}

	/**
	 * @access private
	 */
	function blobEncode($blob)
	{
		return $this->_octify($blob);
	}

	/**
	 * @access private
	 */
	function blobDecode($blob)
	{
		return $this->_unoctify($blob);
	}
}

?>